**********Headphone amplifier using
Time: More Than 15 Hours, Load
Impedance: 16-300. *****High/Low gain switch for optimal performance of the headphones. *****Portable Headphone Amplifier which make it convenient to carry, can output remarkable sound without distortion.
Audio Input: 3.5 mm Jack,
Audio output: 3.5 mm Jack*****Headphone Amplifier works for SONY Sennheiser RS120, HDR 120 and beyerdynamic headphone. *****iphone to headphone amp
Note: Lightning to 3.5 mm cable is not included, you need to buy it yourself